Low frequency output electronic ballast
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United States of America Patent
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Apr 12, 2005
Grant Date -
Sep 16, 2004
app pub date -
Mar 11, 2003
filing date -
Mar 11, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A ballast for an arc discharge lamp load switches high voltage DC at a high frequency based on a low frequency control signal. The switched high voltage is then filtered to remove effects of the high frequency switching. Switching may be accomplished with a high voltage, AC voltage controlled current source generating a high frequency, high voltage substantially rectangular signal at a source output by switching the high voltage DC signal with the low frequency time varying reference signal.
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